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Finding the Fourth Proportional to 265,723.70, 398,330.40 and 88,139.30

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Solution

The fourth proportional to 265,723.70, 398,330.40 and 88,139.30 is: 132,124.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,723.70 : 398,330.40 = 88,139.30 : x
  2. Step 2: Convert to fraction form
    265,723.70/398,330.40 = 88,139.30/x
  3. Step 3: Cross multiply
    265,723.70x = 398,330.40 × 88,139.30
  4. Step 4: Simplify right side
    265,723.70x = 35,108,562,624.72
  5. Step 5: Solve for x
    x = 35,108,562,624.72/265,723.70
  6. Step 6: Final answer
    x = 132,124.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.